Their approach to government is fairly similar, though fascism seems to be a bit more strictly totalitarian on average. They also focused their violence towards different groups which makes a difference, although the murder of dissidents is a prominent element of both.

However, they have quite different economic policies with fascists being generally pro-capitalism and tankies being anti-capitalism, at least to a degree.

But I mean I get it, it’s a meme. This kind of nuance doesn’t fit in 10 words or whatever.